Press ALT+F11 , insert a module, and paste this advanced function:

By: Engineering Toolbox Staff

DIN 5480 defines x*m based on z and m. Use a double XLOOKUP : =XLOOKUP(1, (REF_DIN5480[z]=z_input)*(REF_DIN5480[m]=m_input), REF_DIN5480[xm])